You are right, if you keep doing it you will keep the weight off.  And your visible measures of health will be great.

But I'm not convinced that longterm keto is without risk.  I think it raises the risk of colon cancer and atherosclerosis very significantly.  I've talked to doctors who have told me they are seeing a huge uptick of young people with colon cancer, far more than ever before, just in the last 5 years.  And I notice that is when carnivore diet became popular.  And I notice that medical research going back many decades has made that association before many times.  So I have a hypothesis and I'm running with it.

Of course medical science might be wrong, or misinterpreted or whatever, but I don't want to argue this.  We can just agree to disagree.  I just wanted to state my position so you understand my personal choice here.

I'm only in it for the short term.  I will lose weight, I will see what all the fuss is about, and then I will slowly adjust the diet and try to keep the weight off.